GX470USSummary.doc

lexus gx470gx470 line-up : 2uz-fe engine with a750f (5-speed super ect)line-off : november 2002body : 5-door wagonengine2uz-fe engine feature1.32 + 32 bit cpu2.o2 sensors cup type3.starter holding function 4.new dtc : meets sae code and it divided to more detailed code structure5.sftp & lev ?6. evaporative emission control for lev ii application7.no-contact type throttle position sensor / accelerator sensorcco1.2uz-fe: mani-con 1.1lx2 thin.75micron m ceramic with pt coated, u/f 1.3l x 1 (for usa lev)-reference for 4 runner-(2.1gr-fe: mani-con 1.1l x 2 thin.75micron m ceramic with pt coated, u/f 1.1l x 1 (for usa lev)alternator1. sc alternator (sc1 type 130a)fuel system1. hdpe resin fuel tank (multi layer 6 layers) with sus filler pipe (87l) /(15y / 150k mil)2. quick turn fuel cap with tether2. nylon type tube & hose with multi layer *hdpe resin(high density polyethylene)immobilizer1. separate ecu : key id is memorized in immobi ecu 2. card key with immobi tip 3. door open /close for key registration4. main 5 keys, sub 3 keys can be registered5. immobi start condition: case 1 / ig key pulls off case 2 / 20 sec. after ig key turns to acc or lockstarting system1.starting holding function-ecm controls this function-ne signal use for engine running detectionengine speed : 700r.p.m. or 500r.p.m. and more than 1 sec.-continuous activating time coolant temp. between 20 to 80 degrees celsius : max.5 seconds for one operationcoolant temp. is extremely low : max. 20 seconds for one operation coolant temp. is more than 100degrees celsius : max. 2seconds for one operation-protection for over run : if ne signal is more than 1,200r.p.m. , this function does not activate.-starter operates by key more than 30sec., system stops the operation for starter protection -during the starter operation, acc power is cut chassistransfer vf3b to vf4b(m), (ref.4runner uses vf4am)1.fr.60 : rr.40 torque distribution ratio type torque sensing center differential.at front higher speed condition approx. 30 : 70, at rear higher speed as spin approx. 53 : 47. this ratio is decided by total operating area of clutches in center differential. 2.center differential type change makes 50 mm shorter than current type transfer, lesser weight 1.8kg, number of parts reduced and rigidity increased3.this torque distribution ratio system increases response of steering, increase drive feeling at the cornering with acceleration to reduce under steering feeling4. semi-motor shift (diff. locking by motor, h-l shift by manual lever) h4-h4lock-l4-l4lock (reference 4 runner)2uz-fe : full motor shift control for h4-h4lock-l4-l4lock1gr-fe : full motor shift control for h2-h4-h4lock-l4-l4lock atm feature1. a750 f, 5-speed super ect automatic transmission 2.torque converter -converter unit uses smaller type 15% flatness (vertical / horizontal rate: thinner ) comparing with a34# series for lighter weight and compact design-flex lock up (4th and 5th gears are applied)3. transmission-3 planetary units (front, center, rear) -power plant rigidity 15% increase for low vibration / noise, 10% weight less-aluminum planetary carrier 50% weight less from current type as for a340f etc.4.conrol system -clutch to clutch control with linear solenoid valve (sl1, sl2) for 4th 5th shift control (no one way clutch) -centrifugal pressure release control -line pressure control by linear solenoid (slt)-clutch pressure control by linear solenoid (slt, sl1) -ai-shift (basic shift patter control / road condition support control / drivers intention support control)-two at fluid temp sensors are provided in valve body :one is for indicator & lock up control, other is for pressure control with dtc detection function application 5.non crescent oil pumpbrake system (hard unit)no information for gx470 (reference, prado & 4 runner information)1. fr. prado :17 inch disc, adopt 4 opposed pistons, 4runner :16 inch std, 17inch opt rr. disc brake system adopts floating type caliper2.double link pedal (prado)3. hydro booster, 4. offset type pkb lever (toyota new) that lever and cable winder portion are offset to minimize spacebrake system (electrical control system)1. speed sensor mpu to active wheel speed sensor mre type (rotational direction detection type)2. abs with ebd, ba, trac and vsc are equipped3.dac(down-hill assist control system) -operating condition : dac sw on, l4 range, no accele & brake pedal operation, less than 25km/h -operation : fixed speed driving by 4 wheel optimized brake application without tire locking. it realizes stable down slope driving without accel. brake operation. (5 to 7km/h, reverse 3 to 5 km/h) -system fail-safe : continuous operation makes actuator heating up buzzer sounds and operation gradually stops4.hill-start support control system -prevent vehicle drop to reverse direction at the slope starting off to forward -brake operating to reduce vehicle drop and no more tire locking -after hsc starting, brake is applied to 4 wheel optimally by the signal of vehicle speed, tire rotation direction from vehicle speed sensor and slope angle from deceleration sensor. then, no vehicle drop without keeping of brake pedal application -operation starting condition : d, 4, 3, 2 or l range, no relation of transfer mode as l4 / h4 ( and the model as 2wd / 4wd), and no brake pedal application -finish condition : maximum 5sec. after the starting of operation or vehicle moves to forward. then, buzzer pulsing frequency increases to warn the driver for activation end and gradually release the brake pressure5.vsc operation condition: h4 / l4 without differential lock 6. vsc off sw is provided(reference for 4 runner)-2wd model has trac off sw -dac is applied for 4wd with atm model and hsc is applied for atm model (both 2wd / 4wd)steering1.micro computer pre-set electrical operating tilt & telescopic steering column2.micro computer controls auto away & auto return, and 2 position memory function 3.r&p gear box locates front of axle to make more stable at cornering(reference 4 runner)4. resin ps pump pulley from factory. spare parts is metal type (1gr-fe only) suspension1.h-infinity tems (height control less type) -function : h-infinity semi-active control, imaginary roll damper control, unsprang resonance control, anti-dive control using stop light switch signal, speed sensing damper control, squat control, harsh control ) -componentsaccele sensor(piezo) fr:2 rr:1, absorber control :16 steps actuator by step motor, -4 mode selector switch (comfort, semi-comfort, semi-sport, sport)2. rear air suspension -rear height control sensor lh / rh are equipped -auto height leveling to maintain designed vehicle height and manual adjust function by switch -height control : high + 40 mm, low 20mm. 40 mm up for 15 to 20 sec. down for 10 to 15 sec -vehicle speed sensing auto return : when low position more than 5km/h, high position more than 30km/h, height returns to normal position -rear height adjust function after passenger off : height goes up by passenger off the car after ig off, vehicle height control operates to go down -height control cancel switch is provided for jacky use, towing etc. -active test at engine stop : actuator step fixing for 9 steps, height adjusting (+10 30mm), motor relay on/off operation, exhaust solenoid on/off operation, height control solenoid on/off operation -lh / rh connected and linked control: lh and rh pneumatic chambers are connected via pipe and control valve which operates to open / close to ensure vehicle stability at normal diving and to increase tracing performance to wind surface under off road driving. at normal driving : valve close ensure roll rigidity for vehicle stabilization at off road driving : valve open increase articulation performance increase off road performance3.suspension system : fr. double wish born rr. 4 link(reference 4runner)x-reas(x-relative absorber system)roll rigidity and comfortability -spare parts different : tube 1pc to 2pcs separate type-connection has check valve : only one time disconnect and connect can be available. second time or more, change complete system . no air bleeding procedure and spare parts are supplied with fluid completion. absorber also compressing before connection to the system for fluid leak-operation both compression: fluid does not pass the center uniteach absorber operate opposite movement : fluid passes orifice in center unitabsorbing force of center unit adds to each s/a absorbing force both comp with different speed small volume of fluid passes the orifice in center unitthis adds each s/a absorbing forcewheel & tireonly : 265 / 65 r 17 17 x 7 1/2 jj -25 (reference 4 runner)std : 265 / 70 r 16 16 x 7jj -30opt : 265 / 65 r 17 17 x 7 1/2 jj -30bodysafety-crushable foot rest seat belt -front elec. pre tensioner and 2step force limiter -front with tension reducer -belt warning : d seat only -rear no.1 seat center : 3-point elr, rear no.2 seat center : 3-point ceilling elr -crs : p seat and rear no.2 seat rh/lh/center positions have crs lock function elr seat -seat arrangement : 5 seats for std, 8 seats for opt -leather seat available -wil con seat -full-flat seat (front and second seat)steering -steering pad sw for audio volume / seek / mode -st wheel : leather or real wood type body electricalmpx system1. applied ecu-afunction body ecustdbody elec. controlsub body ecustdbody elec. operationd door ecu stdsecurity ecustdlexus link ecuoptairbag assystdauto. wiper ecuoptrain sensoroptrr a/c control panelopta/c ecustdgateway ecuoptemv ecuoptavc-lan2.body ecu function-door lock :auto lock shift-linked -wireless : power window operation-headlight : 1) auto cut 30 sec. delayed after door closing2) auto cut 30 min. delayed under door open or ajar (gx470, 4runner, lx470, lc100 only) 3) drl -illumination : fade-out function-warning(door ajar), -others(con-light, gateway, memory bank, ram monitor, c-best, diagnosis for all ecus in bean and out put trouble code)3.sub-body ecu-rear wiper control, illumination and step light activation by signal from body ecu, c-best for rear wiper, illumination, switch etc. 4. gateway ecu-this ecu is for the communication between a/c ecu in bean and emv ecu in avc-lan. -information on a/c ecu can be seen on emv screen sliding roof (ecu) (same as 4 runner)-vehicle speed-linked deflector height adjust function (high speed - low position, low speed high position, approx.90km/h up, 70km/h down ) -key cylinder and wireless linked open / close operation-one touch(auto) function(more than 300msec switch operation, manual operation(at less than 300msec switch operation)wiper-rain drop sensing (7-step: no - int. 7sec 3.3 sec 1.5 sec 0.6 sec lo hi) sensor is as ls430s -vehicle speed sensing at “auto” position c-best cancels this *0km/h 4.0 12.5 sec*1-16km/h decel, 1-23km/h accel : 2.5 11 sec*16km/h decel, 23 km/h accel : 1.5 10 sec interval range can be adjusted by sensing dial-vehicle speed sensing at “l(fā)o” position *vehicle stop3 times lo operationint. 2.5sec operation -washer linked wiper with drip-prevention function c-best cancels this or changes to fixed interval of 3 sec.as ls430air conditioning1.hard unit-auto a/c, cool box for four bottles, dual a/c as opt -rs(revolutionary slim)evapo (thickness 58 mm to 38mm). it uses small and multi hole tube and fin on the tube surface. this construction makes narrower evaporator-aluminum heater core- rear foot duct-variable capacity type compressor : 10s20 type (smaller)2.control function-lh/rh independent temp. control-auto econ mode 1st stage of ac on (5min.) it is controlled based on evapo temp. 2nd stage 5min. or more, it is minutely controlled based on the outside temp., blower temp. and designed temp. of compressor control -fog prevention auto a/c on / fresh / def mode: it automatically change to this mode when the condition for easy of fogging is met such as extremely low outside temp., lower sunlight, coolant temp, difference of target temp. etc. -clean air filter with deodorizing functioncombination meter1. vertical sensor locates back side of combination meter to use correction of fuel gauge indication in stable at slope, acceleration / deceleration, cornering etc. -vertical condition : use fuel level sensor signal directly -not vertical : keep the same level of the latest condition at vertical -continuous of not vertical posture : during driving decrease meter indication every 6km/liter, idling 555micro liter / sec. -not vertical condition more than 30 min. : indicates sensor out put signal value -initialization : after meter change (still unclear, unclear )1) while reset switch on, ig switch turns off to on2) reset switch turns to off on off on within 5 sec. after first step of ig on3) then, reset switch turns off for 5 sec. and turns on and stays for 5sec or more. buzzer sounds for 1 sec 4) within 30 sec after buzzer operation, reset switch turns on and stays for 5 sec or more. 5) then, buzzer operates for 1 sec. to inform reset completion. turn off reset switch. 2.connector : set-in connector which is tightened by round head bolt with over tighten prevent function.when tighten, clutch function on the bolt operates and indicator (red mark) can be seen3.oil maintenance indicator system on combination meter (same as 4 runner) -function : if mileage reaches to engine oil maintenance timing, indicator light indicates to warn to the driver -indication pattern 1) stay on for engine oil change timing: mileage adds up more than 7,500 mile from latest reset 2) blinking for 12 sec. for pre-information : mileage adds up more than 5,000mile to 6,999mile from latest reset -bulb check : indicator light on for 3 sec. after ig on -reset procedures : 1) odo / trip meter turns to odo meter indication and ig turns off2) ig turns on while odo / trip switch knob pressing and keep it3) indicator stay on for 3 sec.for bulb check. then, starts blinking for 2 sec.4) indicator change to stay on for 1 sec. and turns off5) at the same time, odo meter indication changes from odo to trip indication for reset completion confirmation. then, release odo / trip mete knobmulti display-driving information etc. with brightness adjusting function (acc or ig on and mode sw press more than 1.7sec to move adjust mode. day time : 3-step, night time : 6-step)emv1.7-inch wide-screen lcd display2.ecu uses 01 navi ecu, denso made (reference for toyota brand model not for gx470 north american spec.)navi screen commonly uses on lexus / toyota (default :lexus). for toyota brand model, ig switch should turn on to off twice after battery disconnection or display change to new one to be recognized between ecu and displayfor lexus model, no action is needed, lexus indication always displays.ig turns on / off twice, then, display indicates. -after display change : lexuslexus toyota-after battery disconnection : toyotalexustoyotaapplication model gx470 prado, lx470 lc100lexus link system same as ls430airbag -d&p seat 2-stage front airbag, side and curtain shield airbag -d seat airbag 2-stage control : seat position sensor, seat belt buckle switch and satellite sensor / airbag assy for collision force detection -p seat airbag 2-stage control : satellite sensor / airbag assy for collision force detection -c pillar sensors add for curtain shield airbag -curtain airbag location : roof side rail upper of rear quarter window -electronic g sensor for satellite sensor (semiconductor type)-fuel cut and mayday link at deployment-back up power source in airbag assy (capacitor and dc-dc converter)trailer wire harness-trailer wire harness & connector (7 pins) and brake controller connector (5 pins) with sub harness are already equipped power outlet-12v socket with cover locates front console-ac115v outlet lexus as std. location : lh deck sideaudio-6cd changer, cd player for other countries, with 6-speaker system / 4-speaker -as opt, pioneer premium sound 9-speaker system -as opt, mark levinson premium sound system 12-speaker system-speaker system 12-speaker system for a (fr : door 6x9 inch. x 2, squawker 6.5cm x 2, tweeter 3.5cm x 2, center 6.5cm x 1, rr: door 16